Dispersion of multi-walled carbon nanotube in tetrahydrofuran functionalized with Ar/O2, Ar/N2, and Ar/N2/H2 plasma

Ogawa, Daisuke; Kato, Masaki; Mori, Junki; Nakamura, Keiji

doi:10.1016/j.surfcoat.2014.08.029

Cited by 17 publications

(9 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…20,21) We have investigated plasma functionalization of multi-walled CNTs (MWCNTs) to substantiate CNT applications. [22][23][24] Our recent focus is to utilize CNTs as a composite material because they can enhance a parent material creating a composite, 25,26) similar to fiber-reinforced plastics (FRP). The material composite of CNTs cannot show the same excellence of CNTs, but it can still enhance the property of the parent material.…”

Section: Introductionmentioning

confidence: 99%

Cause of wear-resistance enhancement of a polyurethane film composite by plasma-functionalized carbon nanotubes

Ogawa

Michiya

Uchida

et al. 2019

Jpn. J. Appl. Phys.

Self Cite

View full text Add to dashboard Cite

Our previous investigation demonstrated that the wear-resistance of polyurethane (PU) film was enhanced by making the film composite utilize carbon nanotubes (CNTs). The use of plasma-treated CNTs further provides enhancement; this led to the hypothesis that the improvement could be more effective by applying isocyanate groups modified on CNTs treated with plasma. This was determined as the plasma contained nitrogen and oxygen species and because a material with isocyanate groups can function as a hardener of polyurethane. This article documents findings ensuant to our previous publication. Here, we present our investigation of the microscopic morphology of the PU film (physical aspect) and identified the chemical bonds (chemical aspect) in order to present the theorem of the enhancement. Observation of the morphology showed no specialty on the PU films with plasma-treated CNTs. On the other hand, an observation with an organic fluorescence, acridine yellow, showed evidence of the chemical aspect used to enhance the film composite with CNTs. Therefore, we concluded that the most effective method was to use isocyanate groups attached through plasma treatment, in order to improve PU wear-resistance.

show abstract

Section: Introductionmentioning

confidence: 99%

Cause of wear-resistance enhancement of a polyurethane film composite by plasma-functionalized carbon nanotubes

Ogawa

Michiya

Uchida

et al. 2019

Jpn. J. Appl. Phys.

Self Cite

View full text Add to dashboard Cite

show abstract

“…The concentration was calculated from the concentration of the CNTs dispersing in the HDI solvent, which was found in the relation between light transmittance and CNT concentration. 18 As seen in the figure, either PU/nCNT or PU/pCNT film became darker when the CNT concentration increased in PU film. However, the two films have slightly different darkening trends; PU/nCNT film is even darker than PU/pCNT film.…”

Section: Characterization Of In Situ Polymerized Pu Film Composite Wi...mentioning

confidence: 75%

“…Here, we show four different concentrations for CNT‐composite PU film; 0.00, 0.01, 0.02, and 0.03 wt% to investigate CNT‐concentration dependency in PU film. The concentration was calculated from the concentration of the CNTs dispersing in the HDI solvent, which was found in the relation between light transmittance and CNT concentration 18 …”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Quantitative effect of plasma‐processed multi‐walled carbon nanotubes for mechanical property of in situ polymerized polyurethane composite

Ogawa,

Morimune‐Moriya,

Fukuda

et al. 2023

Polymers for Advanced Techs

View full text Add to dashboard Cite

This article reports the quantitative effect on carbon nanotubes (CNTs), which are exposed to low‐temperature plasma, for the purpose of a filler application of polyurethane (PU) composite. The plasma exposure provides an opportunity for the surface modification of the CNTs, so the exposure possibly enhances the interfacial interaction in PU composite. In this article, we carried out a wear‐resistant examination to investigate the mechanical property of the PU composite with plasma‐treated CNTs with a variation of the CNT concentration in the PU composite. Our results showed that plasma treatment assisted the resistance of the PU composite. Furthermore, our observation showed that plasma treatment gives a good dispersion in the composite and possibly enhances interfacial interaction due to surface modification.

show abstract

“…Due to the research circumstance, we have studied the effect of the functionalization of CNTs with the use of plasma treatment. [19][20][21][22][23][24] Specifically, we have been focusing on the functional groups, isocyanate groups (NCO), modified on CNTs after plasma treatment and how the functionalized CNTs affect a property of the organic compound. In general, a material with NCO functional group is reactive.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of isocyanate functionalization ratio on multi-walled carbon nanotubes during N₂/CO₂ plasma treatment

Ogawa¹,

Nakamura²

2022

Jpn. J. Appl. Phys.

Self Cite

View full text Add to dashboard Cite

We recently reported how effective and important carbon nanotubes with isocyanate groups after plasma treatment are to polyimide composite. This article is the following report showing the monitoring method for the isocyanate functionalization by plasma treatment on carbon nanotubes using optical emissions from nitrogen and oxygen atoms. We measured the functionalization ratio on the nanotubes with the fluorescent measurement and measured the number density in the gas phase with plasma actinometry. The number of the functionalized nanotubes became maximized when the plasma contained almost the same number density of nitrogen atoms as the number density of oxygen atoms in the gas phase. Our plasma utilized in this article reached this condition when the gas mixture of nitrogen and carbon dioxide had 90 % of nitrogen content. These overall results indicated that the functionalization during plasma processing can be evaluated with the optical emission from the plasma.

show abstract

Dispersion of multi-walled carbon nanotube in tetrahydrofuran functionalized with Ar/O2, Ar/N2, and Ar/N2/H2 plasma

Cited by 17 publications

References 14 publications

Cause of wear-resistance enhancement of a polyurethane film composite by plasma-functionalized carbon nanotubes

Cause of wear-resistance enhancement of a polyurethane film composite by plasma-functionalized carbon nanotubes

Quantitative effect of plasma‐processed multi‐walled carbon nanotubes for mechanical property of in situ polymerized polyurethane composite

Evaluation of isocyanate functionalization ratio on multi-walled carbon nanotubes during N₂/CO₂ plasma treatment

Contact Info

Product

Resources

About

Dispersion of multi-walled carbon nanotube in tetrahydrofuran functionalized with Ar/O2, Ar/N2, and Ar/N2/H2 plasma

Cited by 17 publications

References 14 publications

Cause of wear-resistance enhancement of a polyurethane film composite by plasma-functionalized carbon nanotubes

Cause of wear-resistance enhancement of a polyurethane film composite by plasma-functionalized carbon nanotubes

Quantitative effect of plasma‐processed multi‐walled carbon nanotubes for mechanical property of in situ polymerized polyurethane composite

Evaluation of isocyanate functionalization ratio on multi-walled carbon nanotubes during N2/CO2 plasma treatment

Contact Info

Product

Resources

About

Evaluation of isocyanate functionalization ratio on multi-walled carbon nanotubes during N₂/CO₂ plasma treatment